Casing-screwer.



No 832,238. PATENTED 3ST. 1906. W. H. CLARK.

CASING SUREWEB.

APPLICATION FILED JAN.16. 190a.

mounted by pivot-pins mans n. eaten or sunnssron, r3aresonant..

w fildalhlii fiiQfiEl ifiitu at. ssaase.

To all whom it may concern.-

' Be itknown that 1, WILLIAM H. CLARK, a citizen of the United States, residing at Fullerton, in the county of Orange and State of California, have invented a new and useful Cssin -Screwer, of which the following is a specl 'cation.

The main objectof my invention is to provide a simple and convenient device or machine for screwing casing-sectiohs on or off.

i i-further object is to provide a device or machine for this purpose which can be readily applied to and removed from the casing.

Another object of the invention is to provide for quick and convenient uncoupling or throwing ofi of the driving connection to the easing-engaging parts.

The accompanying drawings illustrate the invention, and, referring thereto, Figure. 1 is a verticalsection of the easing-screw in place on the casing on the line at w in Fig. 2. Fig. Eis'aplan. I I

a The casing is made in sections (indicated at joined together by collars or. couplings 2, which screw on the casing-sections in usual manner. y

3 designates a door. l designates a base-ring resting on the iioor 3 and carrying standards 6, on which are 6 a plurality of wheels 7 to rotatably support the main drivering 8, which has an internal annular ilange 9 engaging in circumferential grooves 10 in the supporting-wheels 7. Ring 8 is formed with bevel-teeth engaged by a. bevel-pinion 11, mounted on a shaft 12 extending radially with respect to ring 8 and beneath the said ring, said shaft 12 being mounted in bearings 13 on base-ring 4. Suitable means, such as a gear 14, is provided on shaft 12ior driving the machin The casing-clamp comprises jaws 16 17,

engaging the casing, said jaws being'each formed with divergmg arms 18, on which are secured toothed or serrated plates 19 for gripping or biting onto the casing. Jaw 16 has at the end of its arms 18 eyes20, in which are pivoted eyebolts 21, whose free ends can swing into forks or notched por- 22in the ends of arms 18 of jaw 17, said bolts 21 having nuts 23 engaging the forks 22 to hold the jaws in clamping position in the casing. The respective jaws 16 17 carry Specification of Letters SEatent. Application filed January is, 1906. Serial no. 296.338:

the casing is partly sunk and that a screw- ,erate equally well in either direction.

E'atented (let. 2, race,

arms 25, pivoted thereto at 26 and extendingout to engage studs 27, projecting up from 55 the driving-gear ring 8.

28 designates the split ring of an elevator, and 29 the links thereof, said. split ring when in closed position on aging under the collar 2 and resting on the cor or support 3, so as to support the casing in position. Except at such times: as the elevator is required in lifting the casing the links 29 will lie in position shown in the drawings, the ring a being of sulficient size to enable said links to lie freely within said ring without interfering with the rotation of the parts and to enable the links to be raised or turned up over the casing for lifting the latter when desired. The driving mechanism for the shaft 12 may consist of a 7o gear 14:, engaged by a pinion 31 on a shaft 82, 1 connected. with a drivingulley shaft 33 through a clutch 34, so t at the casing-- screwer can be thrown into and out of operation without interfering with the operation of the machinery as a whole- The shaft 12 is sufiiciently low and long to enable free passage of the operator around the machine.

The operation is as follows: Assuming that 8o section has been put on and is to be screwed tight to the joint or coupling, the jaws 16 17 are placed thereon and tightened by nuts 23, and the arms 25 are allowed to drop onto the ring 8. On then starting the driving-gear in operation the ins-or studs 27 will in their revolution stri re against the arms 25 and carry the same aroundwith the ring, thereby rotating the clamp 16 17 and screwing the new casing-section into the preceding joint or coupling. As the casing descends in time being screwed on the arms 25 turn on their pivots 26 to allow of such descent, and the sliding contact between the arms 25 and pins 27 enables this movement to take lace without binding, since in the descent oi the casing the arms 25 willtend to spread outwardly and will slide over said pins. On reverse mo' rement of the device arms 25 en age on the opposite side of pins 27, so that t eyTo e serrations in jaws 19'are cut so as to catch into the casing in either direction of movement. The ring 4 is held from rotation by suitable means, as by studs or pins 4, ex so tendinginto sockets in floor or support 3,

The reversal of the casin -serewer for screwmg on or unscrewing is e l'eeted by reversing the driving-engine in usual manner.

It will be noted thatthe whole device is removable and portable.

What I claim is- 1.' A casing-screwer comprising a drivingrin a clamp for engaging the easin and de" tee able connections between the 0 amp and the drivingring.

2. A easing-screwer comprising a drivingring, having a projecting part, a clamp for engaging the casing, and an arm pivoted to the clamp and adapted to rest on the ring and to be engaged by the projecting part thereof.

3. A easing-serewer comprising a drivingring having two studs, a easing-clamp fol-riled eeaeae of two jaws with means for drawing the jaws together, and arms pivoted to the res ective jaws and adapted to fall onto the rivingring in position to be engaged by the respective studs thereon.

A base-ring, wheels pivotally mounted thereon, a gear-ring supported on said Wheels, a pinion mounted on said base-ring and engaging said gearrin and a casing-clamp )rovided with means or detaohably connectmg it-with the gear-ring.

Signed at Los Angeles, California, this 6th day of January, 1906.

' WILLIAM H. CLARK.

Witnesses:

' ARTHUR P. KNIGHT, VERNA A. TALBERT. 

